Entries in Cynthia de la Vega
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Pablo Salazar/Clasos.com/LatinContent/Getty Images(NEW YORK) -- When Cynthia de la Vega accepted her crown at the Nuestra Belleza Mundo Mexico pageant last September, she was thrilled that it meant she would represent her country at the 2011 Miss World pageant.

But the crown has been snatched from her because of a six-pound weight gain, she claims.

"I was very, very excited because I thought this would be a great experience," she told Good Morning America.

But now, she will never make it out of Mexico to fulfill her pageant dreams.

De la Vega has been stripped of her crown, she claims, because she failed to lose enough weight before the competition.

Organizers of Nuestra Belleza Mexico, Mexico's equivalent of the Miss USA pageant, withdrew the 19-year-old's title last month, claiming that she had a "lack of dedication and discipline."

De la Vega came in second in the September pageant. The first-place winner moves on to the Miss Universe pageant while the runner-up, de la Vega, was slated compete in the Miss World contest on Nov. 6 in London.

But de la Vega says her title was stripped over a mere six-pound weight gain.

"I was very sad and very deceived," de la Vega said. "I cried and cried and cried."

The beauty queen admits she has gained weight while pushing herself hard to prepare for the upcoming Miss World pageant, but says she had not been warned of any physical requirements for the competition.

In a press conference last week, de la Vega revealed that her personal pageant coach, Luis Rangel, prescribed her with a diet plan via email, consisting of "the same food during the whole month."

But she said that the pageant itself should have been the ones to offer her diet and exercise assistance if they were going to hold her to a weight standard.

Pageant organizers strongly contest de la Vega's claims that weight was the reason behind their decision.

In a statement announcing the withdrawal of de la Vega's crown, Lupita Jones, national director for the Nuestra Belleza Mexico pageant, cited a lack of discipline, not weight.

The pageant has already named Gabriela Palacio as De la Vega's substitute, who will go on to represent Mexico in November's Miss World pageant.